Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
  • D06L4/60—Optical bleaching or brightening
  • D06L4/65—Optical bleaching or brightening with mixtures of optical brighteners

Definitions

• compositions of optical brighteners consisting of from 0.05 to 0.95 part by weight of a compound of the formula I ##STR1## and from 0.95 to 0.05 part by weight of a compound of the formulae II or III ##STR2##
• X is an oxygen or sulfur atom
• R 1 and R 2 independently from each other, are identical or different radicals selected from the group of hydrogen, fluorine or chlorine atoms, phenyl, C 1 -C 9 -alkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -dialkylamino, acylamino radicals, or optionally functionally modified carboxy or sulfo groups, two adjacent radicals R 1 and R 2 together optionally representing a benzo ring, a lower alkylene or a 1,3-dioxa-propylene group,
• A is cyano, a group of the formulae --COOR 3 or --CONR 2 3 , in which R 3 is hydrogen, alkenyl, C 1 -C 18 -alkyl, cycloalkyl, aryl, alkylaryl, halogenoaryl, aralkyl, alkoxyalkyl, halogenoalkyl, hydroxy-alkyl, alkylamino-alkyl, carboxyalkyl or carboalkoxyalkyl, or two alkyl or alkenyl radicals having the meaning of R 3 , together with the nitrogen atom, may form a morpholine, piperidine or piperazine ring; or A is a group of the formulae ##STR3## in which R 4 is a linear or branched alkyl group having from 1 to 18 carbon atoms, preferably 1 to 6 carbon atoms, optionally substituted by hydroxy groups, halogen atoms, lower alkoxy, dialkylamino, lower alkylmer
• R 7 and R 8 independently from each other, are hydrogen, fluorine or chlorine atoms or C 1 -C 4 alkyl groups.
• R 4 represents the following groups: (C 1 -C 6 )-alkyl, (C 1 -C 6 )-chloroalkyl, dimethyl- or diethylamino (C 1 -C 4 ) alkyl, morpholinoethyl, N- ⁇ -piperidinoethyl, N- ⁇ -(N'-methylpiperazino)ethyl, benzyl, phenoxy-(C 1 -C 4 )alkyl, chlorophenoxy-(C 1 -C 4 )alkyl, (C 1 -C 4 )alkylmercapto-(C 1 -C 4 )alkyl, phenylmercapto-(C 1 -C 4 )alkyl, phenyl, (C 1 -C 6 )alkylphenyl, di-(C 1 -C 6 )alkyl
• a further especially interesting subgroup comprises those compounds of the formula I, in which X is an oxygen atom, R 1 in 5-position is a hydrogen or chlorine atom, a methyl or phenyl group, R 2 is a hydrogen atom, or R 1 and R 2 form together a methyl group in 5,6- or 5,7-position, and R 4 in the A group represents a methyl-, ethyl-, n- or i-propyl, n- or i-butyl, pentyl, chloromethyl, ⁇ -chloroethyl, ⁇ -hydroxyethyl, ⁇ -methoxyethyl, ⁇ -ethoxyethyl, benzyl, phenyl, o-tolyl, p-tolyl, 2,4-dimethylphenyl, o-chlorophenyl, p-chlorophenyl, 2,4-dichlorophenyl or p-methoxy-phenyl group.
• Preferred compounds of the formula II are those in which R 1 and R 2 in 5-, 6- or 7-position are hydrogen or chlorine atoms, (C 1 -C 4 )alkyl, phenyl or together form a fused benzo ring, and especially those compounds where R 1 in 5-position is a hydrogen or chlorine atom, a mthyl or phenyl group, R 2 is a hydrogen atom, or both R 1 and R 2 represent a methyl group in 5,6- or 5,7 position.
• Preferred compounds of the formula III are those wherein R 1 and R 2 in 5-, 6- or 7-position are hydrogen or chlorine atoms, (C 1 -C 4 )alkyl, phenyl, or form together a fused benzo ring, and R 7 and R 8 , independently from each other, represent hydrogen or methyl.
• R 1 and R 2 are hydrogen, chlorine or methyl
• R 7 and R 8 are hydrogen or methyl.
• carboxylic acid derivatives in every respect, that is, compounds having one carbon atoms which is linked to three hetero atoms, especially oxygen, nitrogen and sulfur.
• salts with colorless cations alkali metal or ammonium ions being preferred, and furthermore a cyano, carboxylic acid ester or carboxylic acid amide group.
• carboxylic acid ester groups there are to be understood especially those of the formula COOQ 1 , in which Q 1 is a phenyl radical or an optionally branched lower alkyl group.
• carboxylic acid amide group there is to be understood especially a group of the formula CONQ 2 Q 3 , in which Q 2 and Q 3 are hydrogen atoms or optionally substituted lower alkyl groups which may form a hydroaromatic ring together with the nitrogen atom.
• sulfo groups By functionally modified sulfo groups, there are to be understood, in analogy to the above details, radicals the sulfo group of which is linked to a hetero atom, that is, salts with colorless cations, preferably alkali metal or ammonium ions, and furthermore sulfonic acid ester groups and the sulfonamide group.
• sulfonic acid ester group there is to be understood especially a group of the formula SO 2 OQ 1 , in which Q 1 is as defined above, and by sulfonamide group, there is to be understood a group of the formula SO 2 NQ 2 Q 3 , in which Q 2 and Q 3 are as defined above.
• acyl group there is to be understood especially a group of the formula COQ 4 , in which Q 4 is an optionally substituted, preferably lower, alkyl radical, or a phenyl radical, especially an unsubstituted C 1 -C 4 alkanoyl group or the benzoyl group.
• Preferred substituents R 3 are C 1 -C 6 alkyl, halogeno-alkyl or alkoxy.
• any further subgroups may be formed using the individual meanings of the symbols X, R 1 , R 2 , A and B.
• formation of such subgroups does not mean that introduction of new matter according to 35 U.S.C. 132 is intended.
• alkyl groups and derivatives thereof contain each from 1 to 4 carbon atoms.
• R 1 and R 2 may be cited as examples of R 1 and R 2 : methyl, ethyl, n- or i-propyl, n- or i-butyl, pentyl, hexyl, methoxy, ethoxy, propoxy, butoxy, pentoxy, hexoxy, dimethylamino, diethylamino, trimethylammonium, triethylammonium, acetylamino, cyano- --SO 3 H, carboxyl, carbo-methoxy, -ethoxy, -propoxy, -butoxy and the corresponding groups in the series of sulfonic acid alkyl ester groups, methyl, ethyl, propyl and butyl-carbonamide and the corresponding groups in the series of alkylsulfonamides, and the corresponding dialkylcarbonamide and -sulfonamide groups.
• Two adjacent groups R 1 and R 2 may form together a fused phen
• R 4 may also stand for an unsubstituted or a mono- or bisubstituted phenyl group, the alkyl, alkoxy, acyl, carbalkoxy, alkylcarbonamido, alkylsulfonamido and sulfonic acid alkyl ester groups optionally containing each from 1 to 4 carbon atoms.
• Two substituents R 5 and R 6 may together form a fused benzo or cyclohexyl ring.
• the compounds of the formula I, in which A is an oxadiazole ring, may be prepared according to German Offenlegungsschrift No. 27 09 924 by reacting a compound of the formula IV ##STR7## with a compound of the formula V
• Y is a group of the formula VII and Z is simultaneously a group of the formula VI.
• reaction products of the above processes may be subjected to known further conversions, for example those which, starting from sulfo or carboxy group containing molecules, yield compounds having functionally modified sulfo or carboxy groups, and conversions of such groups to other groups of this kind, or to the free acids.
• chloromethyl groups may be introduced or methyl groups may be oxidized.
• Halogenation and further reactions of the halogen atoms introduced may likewise be carried out, for example chlorine or bromine may be replaced by the amine function.
• the mixing ratio of the individual components is from 0.05 to 0.95 part by weight of component I to the corresponding amount (0.95 to 0.05 part by weight) of the mixture of compounds II and III.
• the optimum mixing ratio depends in each case on the kind of the compounds of formulae I, II and III, respectively, and it can be easily determined by simple preliminary tests.
• the ratio of compounds II and III to each other is not critical at all and may vary within the range of from 0 to 1 part by weight; that is, one of the compounds II or III alone may alternatively be mixed with compound I in the above quantitative range.
• the individual components are given a commercial application form by dispersing them in a solvent.
• the components may be dispersed individually and the corresponding dispersions may then be united, or the components may be mixed in substance and then be dispersed together.
• Dispersion is carried out as usual in ball mills, colloid mills, bead mills or dispersion kneaders.
• a fabric of polyester filaments was washed and rinsed in usual manner in a jig, and dried at 120° C.
• the material so pretreated was subsequently impregnated with a solution containing 0.8 g/l each of an optical brightener of the formula I, or the formula II, or 0.8 g/l of a mixture of both brighteners.
• the material so impregnated was then squeezed off between rollers and adjusted to a moisture content of 80%, subsquently dried on a stenter for 20 seconds at 120° C. and thermosolated for 30 seconds at 190° C.
• the degree of whiteness indicated in the following Table 1 were measured:
• Sections of knitted fabric of textured polyester filaments were pre-washed as usual and subsequently brightened for 30 minutes at 120° C. in a dyeing apparatus (jet) under high-temperature conditions.
• the liquors contained each 0.08% of the textile weight of optical brighteners corresponding to the formulae I or II.
• the brighteners were used per se and in the mixing ratios as indicated in the following Table 2.
• Polyester curtains in raschel-tulle weave were prewashed as usual in a continuous washing machine, dried at 120° C. on a stenter and wound up on a dyeing beam. After having been introduced into a high-temperature dyeing apparatus, the material was treated with liquors containing each a total of 0.05% (of the textile weight) of optical brighteners of the formulae indicated in Examples 1 and 2 alone or in the mixing ratios as indicated in Table 3, furthermore 3 g/l of 50% sodium chlorite. The pH of the liquors was adjusted to 4 by means of formic acid. The curtains were bleached or brightened for 45 minutes each at 120° C., subsequently rinsed, dried and thermofixed at 180° C. The degrees of whiteness as indicated in Table 3 were obtained.
• the polyester fabric was treated for 60 minutes at boiling temperature with addition of a commercial dyeing accelerator on the basis of diphenyl in a goods-to-liquor ratio of 1:6, rinsed and dried at 120° C.
• the degrees of whiteness as indicated in Table 4 were obtained:
• the mixture yields a clearly higher degree of whiteness than the individual component.
• the material so padded was subsequently dried on a stenter for 30 seconds at 120° C., and thermosolated at 190° C. for a further 30 seconds. The following degrees of whiteness were obtained, and again the mixtures showed a higher brilliancy than the individual components.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Detergent Compositions (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Coloring (AREA)
• Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
• Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
• Paper (AREA)

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Citations (6)

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• 1977
  • 1977-05-11 DE DE2721084A patent/DE2721084C3/de not_active Expired
• 1978
  • 1978-05-08 US US05/903,606 patent/US4169810A/en not_active Expired - Lifetime
  • 1978-05-08 CH CH498978A patent/CH647912GA3/de unknown
  • 1978-05-09 GB GB18452/78A patent/GB1588687A/en not_active Expired
  • 1978-05-09 IT IT23196/78A patent/IT1094602B/it active
  • 1978-05-10 CA CA303,000A patent/CA1107913A/en not_active Expired
  • 1978-05-10 JP JP5455578A patent/JPS53139635A/ja active Pending
  • 1978-05-10 BR BR7802937A patent/BR7802937A/pt unknown
  • 1978-05-10 NL NL7805039A patent/NL7805039A/xx not_active Application Discontinuation
  • 1978-05-10 PH PH21123A patent/PH15034A/en unknown
  • 1978-05-11 SE SE7805451A patent/SE7805451L/xx unknown
  • 1978-05-11 FR FR7813972A patent/FR2390537A1/fr active Granted
  • 1978-05-11 BE BE187609A patent/BE866964A/xx not_active IP Right Cessation

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